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Old 03-07-2007, 09:08 AM   #1
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Default Does it looks like the same?

I took a picture of my progt disty. My question is: does it looks the same as 1.8L/1.6L miata?
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Old 03-07-2007, 01:35 PM   #2
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It looks similar to the pictures I've seen of the 94-97 cam/crank position sensor.

Thats from a distributor?
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Old 03-07-2007, 04:11 PM   #3
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It might be the the 1.6 version. I can't remember which one has the optical sensor.
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Old 03-07-2007, 06:20 PM   #4
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Looks like a 1.6 CAS, I think. Never actually taken mine off.

yep: http://members.aol.com/solomiata/Fuel-elec.html
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Old 03-07-2007, 11:38 PM   #5
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Thanks guys,

Al, your link provide sweet info. The 1.6 miata has 2 slot in the cylinder identification, while proGT90 has only one. Also it says the NE signal is triggered at 70deg wich should simplify the setting. I tired a 60-63 deg and I was getting pre-detonation, lol.

Another difference is the G signal is actually 5V....and I installed a 5V pullup, I don't know how it influence the signal?

right from the manual pages, 2E-2G are 5v input in the ecu...someone could take a look to the miata manual??
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Old 03-08-2007, 12:01 AM   #6
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ah, figured the slot in your pic was covered by the sensor. the miata cas has the same voltages.
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Old 03-08-2007, 12:16 AM   #7
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I wonder why have to build a 5v pullup to the 2nd trigger, when it's already a 5v signal then??!

From another angle:
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Old 03-08-2007, 02:36 AM   #8
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You will need to run in dizzy mode with this setup, ie 4 main, 1 extra, A=1, B=2, C=3, D=4.

Jim
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Old 03-08-2007, 09:03 AM   #9
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I've setup this to the megatune page:
A--->1
A return---->0
B--->2
B return--->0

-Wheel decoder
-second trigger enable, what's determine if signal rising or falling, a pullup or not must influence the choice.
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Old 03-08-2007, 03:33 PM   #10
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This is what you should put in:

A--->1
A return---->0
B--->2
B return--->0
C--->3
C return---->0
D--->4
D return--->0

Jim
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Old 03-10-2007, 01:49 AM   #11
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Jim,

the CKP wheel has 4 slots, but the cam runs half the speed of the crank, so there's 2 pickups signal per revolution, that's how I understand the thing.

Also, I use 2 spark output channel (led 17 and 19) for "A" and "B" in wasted spark mode. So you can't really use "C" and "D" in the equation.

Someone agree with that?
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